@article {5580, title = {Flora of the Panama Canal Zone}, journal = {Contributions from the United States National HerbariumContributions from the United States National Herbarium}, volume = {27}, year = {1928}, note = {007, 010, 027, 047, 080, 133, 196, 206}, pages = {179-182}, author = {Standley, P. C.} } @article {5511, title = {Raimondia, a new genus of Annonaceae from Colombia}, journal = {Contributions from the United States National HerbariumContributions from the United States National Herbarium}, volume = {16}, number = {5}, year = {1913}, note = {161}, pages = {217-219; pl. 52-53}, author = {Safford, W. E.} } @article {5513, title = {Annona sericea and its allies}, journal = {Contributions from the United States National HerbariumContributions from the United States National Herbarium}, volume = {16}, number = {10}, year = {1913}, note = {010}, pages = {263-276; pl. 85-99}, author = {Safford, W. E.} } @article {5515, title = {Classification of the genus Annona with descriptions of new and imperfectly known species}, journal = {Contributions from the United States National HerbariumContributions from the United States National Herbarium}, volume = {18}, year = {1914}, note = {010}, pages = {I-IX, 1-68; pl. 1-41}, author = {Safford, W. E.} }